Below are decimal ESN and MSL pairs for specific Sprint PCS phones. There is some sort of relationship between each decimal ESN and its unique 6-digit MSL code, however the algorithm which creates this relationship is unknown.

A mathemetician was working on recreating the algorithm by using known ESN/MSL pairs, however, he was not successful. He was only able to determine that the MSL is a function of the last 6-digits of the decimal ESN.

If someone is enterprising enough to use the following ESN/MSL pairs to recreate the algorithm used to generate the MSL, that would be most excellent. I only ask that the findings be shared with this website.